243043030243 has 4 divisors (see below), whose sum is σ = 261738647968. Its totient is φ = 224347412520.

The previous prime is 243043030213. The next prime is 243043030249. The reversal of 243043030243 is 342030340342.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 243043030243 - 2¹⁷ = 243042899171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243043030249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9347808843 + ... + 9347808868.

It is an arithmetic number, because the mean of its divisors is an integer number (65434661992).

Almost surely, 2^243043030243 is an apocalyptic number.

243043030243 is a deficient number, since it is larger than the sum of its proper divisors (18695617725).

243043030243 is a wasteful number, since it uses less digits than its factorization.

243043030243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18695617724.

The product of its (nonzero) digits is 20736, while the sum is 28.

Adding to 243043030243 its reverse (342030340342), we get a palindrome (585073370585).

The spelling of 243043030243 in words is "two hundred forty-three billion, forty-three million, thirty thousand, two hundred forty-three".